This document discusses Xamarin, a mobile application development platform that allows developers to write native Android, iOS, and Windows apps using C# and .NET. It highlights that with Xamarin, developers can share up to 90% of their code across platforms, including UI code and access to native APIs, while still delivering high performance apps. The document also provides an overview of key Xamarin features like hot-reloading in the IDE and access to common APIs for tasks like text-to-speech across platforms.

1. #XamarinDevDays
Nish Anil
Senior Program Manger, Xamarin Team @ Microsoft
@nishanil

3. Slides, Demos, & Lab - Clone or Download:
http://github.com/xamarin/dev-days-labs

4. #XamarinDevDays
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6. #XamarinDevDays
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7. #XamarinDevDays
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8. #XamarinDevDays
meetup.com/XHackersXamarin Community

10. Swaminathan Vetri
• Senior Engineer @ Target
• Microsoft MVP - Visual Studio
& Development technologies
• Windows/Web/Cross
platform mobile developer
• Blogger, Speaker, Amateur
photographer, Gadget freak

13. iOS WindowsAndroid
Objective-C
Xcode
C#
Visual Studio
Java
Android Studio
No shared code • Many languages & development environments • Multiple teams

14. App Generator
Lua
Javascript
Actionscript
HTML+CSS
Limited native API access • Slow performance • Poor user experience

15. Shared C# codebase • 100% native API access • High performance
iOS C# UI Windows C# UIAndroid C# UI
Shared C# Mobile

16. Microsoft.Phone Microsoft.Networking Windows.Storage Windows.Foundation Microsoft.Devices
System.Data System.Windows System.Numerics System.Core System.ServiceModel
System.Net System System.IO System.Linq System.Xml

17. MapKit UIKit iBeacon CoreGraphics CoreMotion
System.Data System.Windows System.Numerics System.Core System.ServiceModel
System.Net System System.IO System.Linq System.Xml

18. Text-to-speech ActionBar Printing Framework Renderscript NFC
System.Data System.Windows System.Numerics System.Core System.ServiceModel
System.Net System System.IO System.Linq System.Xml

19. Xamarin.iOS does full Ahead Of Time
(AOT) compilation to produce an ARM
binary for Apple’s App Store.
Xamarin.Android takes advantage of
Just In Time (JIT) compilation on the
Android device.

21. ✓Always Up-to-Date
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23. Xamarin is included
in Visual Studio

24. Xamarin.com/Download

25. • Create UI with drag & drop
simplicity
• Target multiple screen
sizes, resolutions and
Android versions
• Layouts saved in standard
Android XML files

26. • Multi-Touch Enabled
• Super Fast
• Rotate, screenshots,
location changes, and
more!
http://bit.ly/hyperv-android

27. • Follows familiar Visual Studio
designer idioms
• Supports all UIKit elements
• Edit custom and 3rd party
components
• Live preview of changes to
properties

28. • Multi-Touch Enabled
• Pressure Sensitive
• Super Fast
• Rotate, screenshots,
location changes
• Never leave VS

32. Xamarin.iOS Xamarin.Android

35. Mac
iOS
Android
Windows Phone
Calca iCircuit Touch Draw
86%
14%
72%
28%
77%
23%
70%
30%
61%39%
94%
6%
88%
12%
76%
24%
90%
10%

38. Shared C# Backend

39. What if we didn’t have to
write this code?
What if we could access
it from shared code?
UI+APIs UI + APIsUI + APIs
Battery
GPS
Lights
Notifications
Settings
Text To Speech
Battery
GPS
Lights
Notifications
Settings
Text To Speech
Battery
GPS
Lights
Notifications
Settings
Text To Speech

40. TextToSpeech
Speak(“Hello World”);
AVSpeechSynthesizer SpeechSynthesizer

41. Common API

42. Thank You!!!
Swaminathan Vetri
Microsoft MVP
swami@wannabeegeek.co
m
wannabeegeek.com @svswaminathan